ams_mitm: Implement system settings mitm

stratosphere/ams_mitm/source/amsmitm_debug.cpp

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2018-2019 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <stratosphere.hpp>
+#include "amsmitm_debug.hpp"
+
+namespace ams::mitm {
+
+    namespace {
+
+        os::Mutex g_throw_lock;
+        bool g_threw;
+        Result g_throw_result;
+
+
+        void DebugThrowThreadFunc(void *arg);
+
+        constexpr size_t DebugThrowThreadStackSize = 0x4000;
+        constexpr int    DebugThrowThreadPriority  = 49;
+        os::StaticThread<DebugThrowThreadStackSize> g_debug_throw_thread(&DebugThrowThreadFunc, nullptr, DebugThrowThreadPriority);
+
+        void DebugThrowThreadFunc(void *arg) {
+            /* TODO: Better heuristic for fatal startup than sleep. */
+            svcSleepThread(10'000'000'000ul);
+            fatalThrow(g_throw_result.GetValue());
+        }
+
+    }
+
+    void ThrowResultForDebug(Result res) {
+        std::scoped_lock lk(g_throw_lock);
+
+        if (g_threw) {
+            return;
+        }
+
+        g_throw_result = res;
+        g_threw = true;
+        R_ASSERT(g_debug_throw_thread.Start());
+    }
+
+}